SN1 reaction underoges through a carbocation intermediate a…

Chemistry Alcohol, Phenol and Ether General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

SN1 reaction underoges through a carbocation intermediate as follows : -

[R = t-Bu, iso-Pr, Et, Me] (X = Cl, Br, I)

The correct statements are

I. The decreasing order of rate of SN1 reaction is t-BuX > iso-PrX > EtX > MeX

II. The decreasing order of ionisation energy is MeX > EtX > iso-PrX > t-BuX

III. The decreasing order of energy of activation is t-BuX >

iso-PrX >EtX > MeX

I & II are correct

I & III are correct

II and III are correct

I, II & III are correct

Text Solution

Verified by Experts

The correct answer is:

Rate of SN1 reaction is a

t Bu X > iso - PrX > EtX > MeX

So order of activation energy

t – BuX < iso PrX < EtX < MeX

order of ionisation energy

t BuX < iso PrX < EtX < MeX

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